package basic.basic_class08;

/**
 * 手撕基础班8
 */
public class Test {

    // 手撕最小路劲问题
    public static int minPath(int[][] matrix) {
        if (matrix == null || matrix.length == 0 || matrix[0].length == 0) return 0;
        int[][] dp = new int[matrix.length][matrix[0].length];
        //初始化
        int row = matrix.length;
        int col = matrix[0].length;
        dp[0][0] = matrix[0][0];
        for (int i = 1; i < col; i++) {
            dp[0][i] = dp[0][i - 1] + matrix[0][i];
        }
        for (int i = 1; i < row; i++) {
            dp[i][0] = dp[i - 1][0] + matrix[i][0];
        }
        for (int i = 1; i < row; i++) {
            for (int j = 1; j < col; j++) {
                dp[i][j] = Math.min(dp[i - 1][j], dp[i][j - 1]) + matrix[i][j];
            }
        }
        return dp[row - 1][col - 1];
    }


    public static void main(String[] args) {
        int[][] m = { { 1, 3, 5, 9 }, { 8, 1, 3, 4 }, { 5, 0, 6, 1 }, { 8, 8, 4, 0 } };
        System.out.println(minPath(m));
        //System.out.println(minPath2(m));

        //m = generateRandomMatrix(6, 7);
        System.out.println(minPath(m));
        //System.out.println(minPath2(m));
    }
}
